Generic Image Call in Functions
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This question is mostly due to my lack of knowledge of php. In the slider I want to use a different generic image. I see that it’s called in the parent theme’s
functions.php
file. I also know I need to edit that in the child’sfunctions.php
file. However, do I need to put ALL of this code in the child theme?if (!function_exists('graphene_get_post_image')) :
function graphene_get_post_image($post_id = NULL, $size = 'thumbnail', $context = '', $urlonly = false){
/* Display error message if no post ID is supplied */
if ($post_id == NULL){
_e('<strong>ERROR: You must supply the post ID to get the image from as an argument when calling the graphene_get_post_image() function.</strong>', 'graphene');
return;
}
/* Get the images */
$images = get_children(array(
'post_type' => 'attachment',
'post_mime_type' => 'image',
'post_parent' => $post_id,
'orderby' => 'menu_order',
'order' => 'ASC',
'numberposts' => 1,
), ARRAY_A);
$html = '';
/* Returns generic image if there is no image to show */
if (empty($images) && $context != 'excerpt' && !$urlonly) {
$html .= apply_filters('graphene_generic_slider_img', '<img alt="" src="'.get_template_directory_uri().'/images/img_slider_generic.png" />');
}
/* Build the <img> tag if there is an image */
foreach ($images as $image){
if (!$urlonly) {
if ($context == 'excerpt') {$html .= '<div class="excerpt-thumb">';};
$html .= '<a href="'.get_permalink($post_id).'">';
$html .= wp_get_attachment_image($image['ID'], $size);
$html .= '</a>';
if ($context == 'excerpt') {$html .= '</div>';};
} else {
$html = wp_get_attachment_image_src($image['ID'], $size);
}
}
/* Returns the image HTMl */
return $html;
}
endif;I want to call a different image from the child theme’s image folder, changing this:
src="'.get_template_directory_uri().'/images/img_slider_generic.png"
to this image instead:
src="'.get_template_directory_uri().'/images/img_slider_generic-GCGOP.png"
By the way, I tried adding only this part to the child’s file, but it didn’t work:
/* Returns generic image if there is no image to show */
if (empty($images) && $context != 'excerpt' && !$urlonly) {
$html .= apply_filters('graphene_generic_slider_img', '<img alt="" src="'.get_template_directory_uri().'http://www.greggcountygop.com/public_html/wp-content/themes/graphene-child/images/img_slider_generic-GCGOP.png" />');
}All I got was this error when I tried saving the
functions.php
file:Warning: Cannot modify header information – headers already sent by (output started at /home/gcgop/public_html/wp-content/themes/graphene-child/functions.php:40) in /home/gcgop/public_html/wp-admin/theme-editor.php on line 99
AdminThat error is usually caused by the mentioned file outputting a character when it isn’t supposed to. Check your child theme’s functions.php file to see if you have an extra space between the opening
<?php
and closing?>
tags at or about line 40.To change the generic image, just add this in your child theme’s functions.php file:
function graphene_custom_generic_img(){
return '<img alt="" src="'.get_stylesheet_directory_uri().'/images/img_slider_generic-GCGOP.png" />';
}
add_filter( 'graphene_generic_slider_img', 'graphene_custom_generic_img' );
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